Li-Ion Charger Features: Fast CPU charger for Li-ion cells of various sizes 18650 22650 26650 21700 25500 3 charging stages: TC / CC / CV Deep cell reactivation and 0 V Charging current: 2 x 2 A. 1 x 3 A Two independent channels Charging voltage: 4.2 V - Power supply via micro-USB - Without power supply - Thermal protection - Short circuit protection - Prevents reverse insertion of the battery 【As a fast charger】Thanks to the QC3.0 Protkol, charging currents of 2 A (x2) or 3 A (x1) are available. 【Wide compatibility】Use for 3.6 V / 3.7 V Li-ion batteries 18650 22650 26650 21700 25500 rechargeable batteries. In addition, protected 20700/21700 batteries can also be charged with the charger. 【Adaptive Intelligent Identification】Internal resistance test function, automatic current adjustment, protection of batteries and charger, ensuring charging safety 【Protect your batteries】Accurate shutdown, efficient charging and never overcharge batteries